1594991 has 6 divisors (see below), whose sum is σ = 1694640. Its totient is φ = 1500896.

The previous prime is 1594987. The next prime is 1595003. The reversal of 1594991 is 1994951.

It is not a de Polignac number, because 1594991 - 2² = 1594987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1594921) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2471 + ... + 3048.

It is an arithmetic number, because the mean of its divisors is an integer number (282440).

2^1594991 is an apocalyptic number.

1594991 is a deficient number, since it is larger than the sum of its proper divisors (99649).

1594991 is an equidigital number, since it uses as much as digits as its factorization.

1594991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5553 (or 5536 counting only the distinct ones).

The product of its digits is 14580, while the sum is 38.

The square root of 1594991 is about 1262.9295308924. The cubic root of 1594991 is about 116.8385285650.

The spelling of 1594991 in words is "one million, five hundred ninety-four thousand, nine hundred ninety-one".